Insulator



J ly 13 1926.

M. H. NEWMAN ET AL INSULATOR Filed March 26, 1923 INVENTOR mau e/c5 M 11mm Y YATTORNIEY Patented July 13, 1926.

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MAURICE NETVIWAN, OF ALAMEDA, AND 'EVILLIABI A. GILARDIN, OF OAKLAND, CALIFORNIA.

INSULATOR.

Application filed March 26, 1923.

()ur invention is an improved electric insulator.

The usual type of insulating knob has a separate cap which is forced against the wires on the body of the insulator by a nail which passes through the cap, insulator and into the support. It is very difficult to hold the wires taut, and the cap in position, and at the same time hammer on the nail.

The object of our invention to provide an insulator, which has the cap secured to the body, but a light tap will pinch it against the wires lying between it and the body.

lVe provide an insulator knob having a pair of transverse bores through which wires may be inserted sidewise, and in the center of the insulator there is a transverse slot parallel to the transverse bores, with thin wall separating the slot and the bores. A nail passes through the insulator in the usual way and after the wires are inserted in place, a. slight tap on the head of the nail. breaks the thin wall and allows the head of the insulator to jam downwards on the body part, and thereby hold the wires in a firm position.

Other objects are to provide an insulator which is easy to install, simple in construc tion and inexpensive to manufacture.

In the drawing in which our invention is illustrated Figure 1 is a side elevation of our insulator.

Fi ure 2 is a sectional view taken on the line 22 of Figure 1.

Referring more particularly to the drawing, our insulator 1 has a pair of transverse bores 2 and 3 formed therein; said bores are close to the top of the insulator and adjacent the periphery, forming a neck et between them. The outer walls of the bores 2 and 3 are cut through as 55 respectively. A central transverse slot 6 is cut through the insulator 1 below the bores 2 and This slot extends approximately to the center of each of the bores 2 and 3, leaving thin walls 7 and 8 respectively between the slot and the bores. Thus a head 9 is formed over the body 10. A nail 11 ex Serial No. 627,826.

tends through the insulator 1 whereby said insulator is secured to its support.

In practice the wires are placed through the bores 2 and 3 and drawn tight. The nail 11 has been partly driven into the support to the pcsition shown in Figure 1.

With the wires in position a final blow of the hammer drives the nail deeper into the support, breaks the walls 7 and 8 and allows the DQ-Cli lto enter the slot 6 and bind the wires securely between the head and the body 10.

Our invention is not to be confused with insulators having a head attachedto a body portion on one side or at the edge which is designed to be broken by a slight tap after the wire is threaded therethrough. Insulators of this type designed to hold two Wires, require that one wire be fed through one of the transverse bores, which is a very inconvenient operation and in many instances impractical. Thus insulators of this type are only suitable for holding one wire. Our invention is also different from insulators provided with'a central socket in which a head may slide and being jammed down ward by the nail accommodates wires of different sizes. In this type, it is not practical to have the loose heads lit the socket so snugly that they will not become separated and displaced from the assembly.

Having described our invention, we claim:

1. An insulator comprising a body portion, a head portion, a transverse bore adapted to receive a wire, a transverse slot in the body portion, a thin frangible wall between the bore and the slot, and an aperature through the head and body for a nail.

2. In insulator having a plurality of transverse bores adapted to receive wires insertable sidewise through an opening from the bores to the periphery of the body, a slot through the body substantially parallel to the said bores, a thin wall between the slot and both of the bores, said wall being readily frangible and means to hold the insulator in position with the thin Wall broken and the wires clamped between the two parts of the insulator.

3. In insulator having a body and a head portion, a pair of transverse parallel bores, openings from said bores to the periphery of the insulator, through which wires may be inserted, a neck portion between the bores, a transverse slot parallel to the said bores, a. thin frangible wall separating the slot from the bores and means to secure the insulator in position with the neck portion partially housed in the said slot after the frangible wall is broken, thereby clamping the wires between the head and the body portion.

In testimony whereof we affix our signatnres.

h [AUIHCE H. NElVhIIAN. lVlLLlAlMI A (HLARDIN. 

